Twister-spool slot protector



Aug. 3 1926.

' H. D. CLINTON TWIS'I 'ER SPOOL SLOT PROTECTOR Filed March 15, 1926 mama- Aug. 3, .192 i umrao srA'ri-zs PATENT OFFICE.

' HARRY D. CLINTON, OF JOHNSON CITY, NEW YORK.

TWISTED-SPOOL SLOT PROTECTOR.-

Application filed larch 15, 1926. Serial m. 94,924.

This invention relates to driving connections between driving spindles and twister spools, and more particularly to means for I protecting the slotted. ends of spools hav I ing -'wooden barrels and vulcanized fibre heads.

' A common form of protector of the character referred to, heretofore employed, consists of a metal plate having an oblong slot 10 therein co-incident with the oblong slot in the end of the spool and secured to the spool head by means of screws which are liable to work loose and cause trouble, usually resulting in rendering the spool unfit for use after the protector plate has worked loose,

rendering it necessary to tighten the screws at intervals in order to prevent trouble, and

such devices are also rather expensive. Fur

thermore, such protectors are not suitable for use on hard fibre head spools in which the end of the wooden barrel to be connected with the driving spindle is extended beyond the hard fibre head, as in the case of my improvement.

' A metal plate with end portions shaped to conform to the shape of the ends of the slot in the spool head and with its intermediate portion embedded in the spool head so as to embrace the slotted end of the wooden barrel, and forming a lining for the ends of the slot to prevent wear. has also been employed, but such construction leaves the intermediate portion of the slot, or that portion which is formed in the end of the barrel, exposed to wear, and such devices are unsatisfactory and are also unsuitable for use with a spool having a wooden barrel with the end thereof-extended beyond the fibre head.

My invention has for its object to provide .a simple, efiicient and inexpensive protector for the projecting end of the wooden barrel of a twister spool having vulcanized fibre heads, and which. will not be subject to the foregoing objections, and. will thoroughly protect and prevent wear and injury to the slotted end ofthe wooden barrel of a vul- -canizedfibre head twister spool.

Other objects are to provide a protector or shield for the projecting end of the wooden barrel of a vulcanized fibre head spool, which is inexpensive to make and may be. easily applied and immovably secured on the projecting end of the barrel in such manner as to lock the protector in place without using other fastening means than such as are lnherent in the protector itself and the barrel end co-operating therewith.

The invention will first be hereinafter more particularly described, with reference to the accompanying drawings, which are to be taken as a part of this specification, and then pointed out in the claims at the end of the description. In said drawings, Fig. 1 is a side elevation of a twister spool having a driving. connection with a driving spindle and having a protector for the spool end embodying my invention;

Fig. 2 is a vertical sectional elevation of the twister spool and driving spindle, partly broken away and showing the driving contwister spool shown has a wooden barrel A with a central bore and vulcanized fibre heads B, and the barrel has a reduced extension A at one end which projects through 'a central opening in the fibre head and is formed or provided with a transverse slot or recess a spanning said central bore and slightly concave on opposite sides to make the center of the slot or recess of the same size and shape as said central bore and form in effect a continuation thereof to adapt the spool to be mounted on a driving spindle C. The projecting end A of the barrel is exteriorly grooved to provide an exterior marginal protuberance or rib a on each sideof the slot. At its junction with the end of the spool or wooden barrel the spindle has an enlarged base portion G which is formed or provided on the upper end thereof with angular lugs or projections c on opposite sides adapted to fit within the slot or recess a in the projecting end of the spool or wooden barrel A, and form a driving connection the spool. For rotating the spindle it has a sheave or pulley C thereon for connection with a belt driven from any suitable source of power. Said base portion C of the spin- .dle is formed or provided with a shank or it from splitting, I provide a protecting device D which may be struck up from sheet metal so as to form a circular bodyhaving a transverse centrally disposed depressed portion d, to form a tongue of approximately the same size and shape as the slot in the spool end and adapted to fit snugly within said slot and provide a lining therefor, said device also having laterally extending side portions d ofsubstantially semi-circular form, with the rim or outer edge d thereof turned so as to overlie and embrace the correspondinglyshaped end portions of the spool or projecting end A of the barrel on opposite sides of the slot therein.

In applying the protector it is placed over the projecting bifurcated end of the spool or wooden barrel and the centrally'depressed portion thereof or tongue d is pressed into the slot in the spool end while the rim or marginal portions cl are'brought into position to overlie the marginal ribs or protuberances on the spool end, and thereupon sufiicient pressure is applied to said marginal portions to force them inwardly toward and against the outer sides of the spool end, thus firmly securing the two parts together in a very efficient and economical manner and without the use of screws or other fastening means than such as are inherent in the protector itself in co-operation with the slotted and externally ribbed spool end, and when once secured in place the protector'is not liable to become loose and it cannot be withdrawn from engagement with the spool end b any strain thereon to which it is usuall su jected in practical use, as a result 0 its con- I nection with the driving spindle.

The protector may be formed of sheet metal or other suitable material and it is adapted to serve not only to protect the projecting end of the spool against wear exteriorly, but also to prevent wear u on the v side walls of the slot, and 'it also a ords a means for easily engaging the twister spool with a projection or projections on the adjacent. end of a drivingspindle and the cost of manufacture is reduced to a minimum. It is also much lighter than metal protectors of the kind hereinbefore mentioned, and the expense of applying the sameto the wooden g barrel end is infinitesimal as compared with securing the protector to the spool so that it cannotbe removed without considerable applied force and is not liable to accidental displacement in ordinary use.

Having thus described my invention,

what .I claim as new and desire to secure by Letters Patent of the United States is:

1. In combination with a twister spool having a wooden barrel with one end projecting through a hard or vulcanized bre head; said projecting end having a centrally disposed transverse slot therein and an exterior protuberance or enlarged terminal extending on both sides of said slot, a metal cap or cover for said projecting end having a centrally de ressed portion shaped to conform to the s a e of and fit snu ly in said 'slot' and latera y extending su stantially semi-circular portions overlying said projecting end and having the margins thereof overlying said protuberance and compressed thereagainst and against the spool end so as to firmly secure the two parts together.

2. In combination, a twister spool having a transverse slot in the end thereof and external marginal ribs or protuberances on opposite sides of the slot, and a protecting and strengthening device for the end of the spool and slot comprising a substantially circular metal body having a centrally disposed depressed portion extending transversely thereof of a width 'sufiicient to receive an oblong projection or tongue on a driving spindle andrshaped to conform to the shape of and fit snugly within and fill said slot'; said device also having substantially semi-circular laterally projecting side vulcanized fibre head, said projecting end having external ribs thereon and a trans- .verse slot therein, and means for protecting and strengthening said barrel end; said means consisting of a sheet metal body of substantially circular form having a centrally depressed portion of sufiicient width to receive a rectangular projection or tongue on a driving spindle and shaped to conform to the shape of and fit snugly within said slot' and provide a metal lining therefor;

said body also having laterally extending substantially semi-circular portions overlying said ribs and corressondingl -shaped I arts of the spool end an secure thereto by compressing the rim or margin of the protector against the spool end.

4. A protector for a twister spool slot in the end of a wooden barrel projecting through a head of hard fibre or the like,

. comprising a metal body of circular form having a centrally depressed portion shaped margins of said side portions of the pro tector against the end of the spool.

5. In a device of the character described, a wooden barrel having an end pro'ecting through an inflexible head; said end aving a transverse slot therein and external protuberances thereon on opposite sides of the slot, and. a device for protecting and strengthening said slotted end comprisin a metal cap having a centrally (115%0 se depressed portion of sufiicient widt to receive a rectan ular end-portion of a drivshaped to conform to the ing spindle an shape of and fill said slot and also having integral substantially semi-circular laterally projecting portions or wings overl ing said protuberances and projecting en of the barrel and pressed thereagainst so as to firmly secure the cap thereto and pro vlide a metal lining co-extensive with said 5 0t.

In testimony ,whereof I aflix m signature.

HARRY D; C INTON. 

